With the 2013-14 Broadway season coming to a close this month (April 24 was the cut-off date for eligibility for the 68th Annual Tony Awards), Playbill.com offers a four-part look at the current season. Here are this season's special engagements.

Karina Smirnoff

From the return of Forever Tango, featuring Karina Smirnoff and Maksim Chmerkovskiy of "Dancing With the Stars" fame, to Billy Crystal's 700 Sundays, which was filmed for HBO during this Broadway engagement, here is an overview of the four special engagements that opened in time for the 2013 Tonys, which will take place June 8 at Radio City Music Hall.

Show: Forever TangoTheatre: Walter Kerr TheatrePreview: July 9, 2013Opening: July 14, 2013Closing: Sept. 15, 2013Creators: Concept by Luis Bravo.Original Principal Cast: Guest star vocalist Gilberto Santa Rosa, gust star dancers Karina Smirnoff and Maksim Chmerkovskiy with dancers Juan Paulo Horvath, Victoria Galoto, Marcela Durán, Gaspar Godoy, Sebastián Ripoll and Mariana Bojanich, Soledad Buss and César Peral, Ariel Manzanares and Natalia Turelli, Diego Ortega and Aldana Silveyra, "Zumo" Leguizamón and Belén Bartolomé, Florencia Blanco and Hernán Lazart.Synopsis: "Forever Tango is music, drama, culture, a way of life," press notes state. "The popularity of tango has exploded all over the world. Sensuous and sophisticated, the tango is a feeling that you dance. A story is channeled through the flick of the leg, the tug of a hand, the tap of a foot, and the arch of an eyebrow. It’s passionate, yet melancholic. Tender, yet violent. You dance it with somebody, but it is so internal, you dance it by yourself."

Show: Let It BeTheatre: St. James TheatrePreview: July 16, 2013Opening: July 24, 2013Closing: Sept. 1, 2013Creators: Direction by John Maher. Music by The Beatles.Original Principal Cast: Graham Alexander, John Brosnan, Ryan Coath, JT Curtis, James Fox, Reuven Gershon, Chris McBurney, Luke Roberts, Ryan Alex Farmery, John Korba and Daniel A. Weiss.Synopsis: Let It Be began as a West End production to celebrate The Beatles' 50th anniversary. Using projection technology and 3D sound, the show chronicles the Beatles' rise from Liverpool's Cavern Club to the height of their fame through live performances of songs including "Twist and Shout," "She Loves You," "Drive My Car," "Yesterday," "Hey Jude," "Come Together" and "Let It Be."

Show: Il Divo – A Musical Affair: The Greatest Songs of BroadwayTheatre: Marquis TheatreOpening: Nov. 7, 2013Closing: Dec. 13, 2013Creators: Direction by Brian Burke. Musical Staging by Kim Craven.Original Principal Cast: Urs Bühler, Sébastien Izambard, Carlos Marín, David Miller and Heather Headley as a guest artist.Synopsis: The quartet have a history with musical theatre; Marín played Marius in Les Misérables when the show first premiered in Spain in 1993, while Miller played Rodolfo in the 2003 Broadway production of La Bohème. Il Divo have sold over 26 million albums worldwide, achieved over 50 number one records, received 160 gold and platinum sales awards in over 33 countries and staged four groundbreaking world tours.

Playbill editor Blake Ross interviews Il Divo:

Show: 700 SundaysTheatre: Imperial TheatrePreview: Nov. 5, 2013Opening: Nov. 13, 2013Closing: Jan. 5Creators: Written by Billy Crystal. Direction by Des McAnuff.Original Principal Cast: Billy Crystal.Synopsis: The autobiographical 700 Sundays is described as "an original two-act play in which Billy plays numerous characters that have influenced who he is today. It deals with his youth, growing up in the jazz world of Manhattan, his teenage years, and finally adulthood. It is about family and fate, loving and loss."